"There is a little more attrition than we expect this early on, but not as much as you really, really think, especially in light of the stock languish," Missen said in the interview.

Several of Facebook's top employees have left the company since the IPO, including the company's chief technology officer Bret Taylor, platforms director Cat Lee and the director of partnership marketing Katie Mitic.

Missen highlighted a few factors that may be driving Facebook employees to up and leave, including the fact that some employees are coming up on their four-year vesting period, as well as the strong startup market looking for talent and the fact that Facebook waited so long to go public.